Sprayer



1934- E. s. LYNGQER 1,972,531

SPRAYER Filed Jan. 25, 1953 INVENTOR J Y/W w ATTORNEY Patented Sept. 4,1934 PATENT OFFICE SPRAYER Erik Sigfrid Lynger, Stockholm, Sweden,assig'nor to Electrolux Corporation, Dover, DeL, acorporation ofDelaware Application January 25, 1933, Serial No. 653,453 In GermanyFebruary 9, 1932 2 Claims.

tional view of a preferred embodiment of my in-- vention.

Referring to the drawing, reference character ll designates a containeradapted to hold liquid.

Container 10 may conveniently be a glass jar provided with a threadedtop 11. A cover member 12 provided with screw threads is adapted to'engage the threaded top 11 of jar 10. A washer 13 90 of rubber or othersuitable material is preferably placed between the top of the jar andthe cover member.

Secured to cover member 12, as by welding, is

an air supply tube 14. One end of tube 14 :6 may be enlarged, as isshown at 15, so as to be adapted to receive the end of an air supplyconduit 16. The other end of air supply conduit 16 may be connected tothe exhaust of a vacuum cleaner, or to any other suitable source of air10 under pressure. The opposite end of air supply tube 14 is constrictedto form an air blast nozzle 17 providing a relatively small outlet. .Anair relief tube 18 extends through cover member 12 and within the airsupply tube 14. 36 The upper end of relief tube 18 is open 'to theatmosphere while the lower end thereof communicates with the interior ofcontainer 10. An aperture 19 is formed in air relief tube 18 near theouter end thereof and establishes communica- 40 tion between theinterior of air supply tube 14 and the interior of the relief tube. Thediameter of aperture 19 is less than the interior diameter of relieftube 18.

-.'A liquid riser conduit 20 extends through and is supported by covermember 12 and air supply tube 14. The lower end of riser conduit 20 isadiacent to the bottom of container 10. The other end of conduit 20extends axially within air supply tube 14 and air blast nozzle 1'7 andterminates 80 in a liquid nozzle 21 adjacent to the air blast nozzle.

The operation of the above described device is as follows:

In order to fill the container 10 with liquid, the 55 cover member 12may be unscrewed therefrom and liquid poured into the container, to anydesired height above the lower end of conduit 20. Air supply conduit 16is then connected to air supply tube 14 and when air under pressure issupplied thereto, the pressure will be increased within air supply tube14 above atmospheric pressure, particularly in view of the constrictedair blast nozzle 17. Air will therefore pass through aperture 19 towithin relieftube 18. If the upper end of tube 18 is open to theatmosphere, this air will escape through the open end of tube 18 andpressure will not be built up within container 10. Under theseconditions, a blast of air will be emitted from air blast nozzle 17 butno liquid will be emitted from liquid nozzle 21.

When in use, the sprayer is conveniently held in the operator's hand bygrasping both the air supply tube 14 and the air supply conduit 16 inthe region where the two are joined.

When it is desired to spray liquid, the operator places his finger orthumb of the hand holding the sprayer, over the open end of relief tube18, thereby closing it. This causes the air passing through aperture 19into tube 18 to pass downwardly into container 10, thus building uppressure in the container which causes liquid to be forced upwardlythrough riser conduit 21 and to be ejected through nozzle 21 asa finestream. The air blast surrounding liquid nozzle 21 breaks this stream upinto a fine spray which is carried 35 by the blast of air. In order tostop the operation of the sprayer, it is only necessary for the operatorto remove his finger or thumb from the end of relief tube 18, wherebythe pressure in container 10 is relieved.

Due to the fact that the diameter of aperture 19 is smaller than theinternal diameter of relief tube 18, and due to the fact that theaperture is located nearer to the outer end of the tube than it is tothe lower inner end, the air under pressure passing through aperture 19will pass out the upper end of relief tube 18, when this end is open,instead of passing downwardly and building up pressure in the container.

While I have described one more or less spe-- cific embodiment of myinvention, it is to be understood that it is for purposes ofillustration only, and that I am to be limited only by the appendedclaims viewed in the light ofthe prior I art.

What-I claim is:

1. A sprayer without moving parts comprising a liquid container havingan open top, a cover member engageable with said container, an airsupply tube secured to said cover member, one u.

end of said tube being adapted to be connected to an air supply conduitand the other-end of said tube being constricted to form an air blastnozzle, a liquid riser conduit extending through, and being supported bysaid cover member, one end of said riser conduit extending to near thebottom of said liquid container and the other end extending within saidair supply tube and being bent and terminating in a liquid nozzleadjacent to and co-axial with said air blast nozzle, and a relief tubehaving an inner end within said container and extending through saidcover member and through said air supply tube at substantially rightangles to the axis thereof and having an outer end in communication withthe atmosphere, said relief tube being formed with an aperturetherethrough communicatingwith the interior of said air supply tube, thecross-sectional area of said relief tube being greater than thecross-sectional area of the aperture therethrough and said relief tubehaving an upper opening closable directly by the hand of the operator 2.A sprayer without moving parts comprising a liquid container having anopentop, a cover member 'engageable with said container, an air supplytube secured to said cover member, one end of said tube being adapted tobe connected to an air supply conduit and the other end of said tubebeing constricted to form an air blast nozzle, aliquid riser conduitextending through, and being supported by said cover member, one end ofsaid riser conduit extending to near the bottom of said liquid containerand the other end extending within said air supply tube and being bentand terminating in a liquid nozzle adjacent to and co-axial with saidair blast nozzle, and a relief tube having an inner end within saidcontainer andextending through said cover member and through said airsupply tube at substantially right angles to the axis thereof and havingan outer end in communication with the atmosphere, said relief tubebeing formed with an aperture there-' through located nearer to itsouter end than to its inner end and communicating with the interior ofsaid air supply tube, the cross-sectional area of said relief tube beinggreater thanthe cross-sectional area of the aperture therethrough andsaid relief tube having an upper opening closable directly by the handof the operator.

ERIK SIGFRID LYNGER.

